Sprinting is the greatest anti-depressant in the world. Studies show it boosts GABA (the neurotransmitter that literally shuts off anxiety and overthinking) up to 20%. Most mental disorders come from low glutamate and GABA activity. Forcing the mind into the low energy state. Learned helplessness. But sprinting changes that. I'd argue anyone on anti-depressants could stop taking them within a month if they sprinted religiously 3x a week. Not to mention the insane boost of IGF-1 growth hormone and testosterone that comes with regular practice too. I have been doing 5 sets of 95% effort for 25metres every week since January 1st and have noticed a significant increase in big dick energy. There is a subtle and calm confidence that follows me in my day. Seriously try sprinting. You will feel unstoppable. Source:

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